In reflex pathways: a) the receptor is a membrane protein b) the efferent is always a motor neuron or hormone c) the efferent is the cell or tissue that does the final work in the pathway d) the integrating center for a neural or neuroendocrine reflex is always some part of the CNS

D

Explanation:

The neural pathway regulates the action reflex. At times sensory neurons synapse occur in the spinal cord rather than the brain, this allows for a quicker reflex action. Synapses in the spinal cord activate spinal motor neurons without delay, which is likely the case if the signals go to the brain, the brain doe however receive the sensory input during the reflex action.

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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explanation: